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1
Pellegatti, Samuele. "Motorized system for opening and closing a domestic dishwasher". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18651/.
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Study and prototyping of a motorized domestic dishwasher for opening and closing the door automatically. Work is split in 3 parts: mechanic, electronic, software.
Mechanic deals with hinge kinematic analysis, concept development, simulation analysis, components sizing and construction.
Electronic refers to components research, setup and displacement on the dishwasher.
Software regards Arduino Mega (the used MCU) state programming.
This thesis contains also intermediate trials with encoutered troubles and show how they've been solved.
Many future implementations are finally presented.
2
Söldner, Constantin, Frank Danzinger, Angela Roth y Kathrin Möslein. "Open Innovation by Opening Embedded Systems". Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-100980.
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1 INTRODUCTION
With the increasing capabilities of today’s smart phones, the demand of consumers for new applications has risen dramatically. By opening up these smart phones and providing third parties the opportunity to develop “apps” for their systems, producers like Apple and platform owners like Google can offer much more value to their customers. As smart phones are one kind of embedded systems (ES), the question arises if similar development can also take place in other kinds of embedded systems. ES, consisting of hardware and software, are embedded in a device to realize a specific function, in contrast to personal computers, which serve multiple purposes [4,30]. The notion of incorporating external actors in the innovation process has been coined open innovation which has become increasingly popular in research and practice since Chesbrough introduced the term in 2003 [12]. By opening up their innovation processes for external actors, firms could benefit from internal as well as from external ideas. In this paper, the notion of open innovation will be explored in the context of ES. The case of ES is particularly interesting, as it requires not only the opening of innovation processes, but also the opening of the embedded system itself. Some of these platforms are opened only to a small degree like Apple’s iPhone, in order to enable others to create new applications for it. Similar developments also take place for example in the automotive software domain, especially concerning infotainment systems. However, most kinds of ES have been spared out by this development until now. As more than 98% of all chips manufactured are used for ES [10] and high-performing computer chips are getting cheaper [38], opening considerations could also prove valuable for a large number of other application domains. However, opening up innovation processes in the context of ES is challenging from both an organizational and technical perspective. First of all, embedded systems are subject to a variety of constraints in contrast to multi-purpose computing devices, like realtime and security constraints or costs and resource constraints. Second, ES are quite diverse both in their composition and in terms on their requirements. In this paper, we want to explore, how the different properties of embedded systems influence possible open innovation processes. This will be done by drawing on to the characteristics of firms implementing the three core open innovation processes suggested by Gassmann and Enkel (2004) [15] and conceptually explaining how the characteristics of ES enable or hinder open innovation processes. As a result, a classification of the OI processes in terms of ES characteristics is provided.
3
Mirshamsi, Ebrahim. "Performance of opening and closing switches for pulsed-power networks". Thesis, Loughborough University, 1996. https://dspace.lboro.ac.uk/2134/35586.
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This thesis describes a study into the performance of both opening and closing switches, as used in pulsed-power networks. It also discusses the important energy storage and compression techniques that are used in the generation of high-energy pulsed power. Various different types of switches are involved in these applications, and particular consideration is paid to the performance of the MESS (Magnetic Energy Switching System) switch, used both in isolation and as part of a pulse-forming network. Exploding wires and foils are also investigated in some detail, since important features from the action of these are present in most opening switches.
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Leutenegger, Paolo, Carlo Vergano, Rainer Herzinger, Jürgen Weber, Nicola Bassetto, Fabio Belluschi, Riccardo Cardani et al. "The roof wing opening system of the UAE pavilion at EXPO 2020". Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71228.
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The UAE Pavilion will be a major attraction at Expo 2020 in Dubai. The roof of the building consists of 28 operable wings made of carbon and glass fiber, having masses ranging from 5 to 18 tons and total lengths in the range of 30 to 65 m that have to be actuated by a dedicated mechanism. In this paper we present the turn-key project for the design, manufacturing, installation, test and commissioning of the Roof Wing Opening System, which represents a unique system world-wide for operating the wings. It consists of one Hydraulic Power Unit with approximately 1 MW of installed power, 2 km of piping working at the nominal pressure of 210 bar, 46 hydraulic cylinders with 1.5 tons of mass each and the complete automation and control subsystem that includes 9 separate PLCs, dedicated software, 2.000 sensors and control points, and over 20 km of harness. One major challenge is the control of the wings. Part of them, due to their huge dimensions and masses, are actuated using two or three hydraulic cylinders that have to be properly synchronized during the movement, preventing unwanted displacements in order to avoid stresses on the wing mechanical structure and ultimately permanent damages. Due to the nature of the project, a final validation of the control algorithms can be done only at system level during the commissioning phase. Therefore, particular care has to be devoted to the verification strategy, anticipating the behavior of the system in the early validation stages and following a V-model approach, in order to identify critical situations and reduce the overall risk. After a brief system description, we will explain how the verification has been approached by using system level simulations and dedicated testing activities on specific subsystems. In particular, we will detail the verification of the control algorithms that has been performed on a dedicated Hardware-Inthe- Loop system first, followed then by dedicated tests on a reduced wing mock-up, allowing the study of the system behavior under the most critical conditions. These include the application of external forces with specified profiles. Finally, we will provide the actual status of the system installation, testing and commissioning activities that have been running in Dubai since January 2019.
5
Gutierrez-Peris, Didac. "The opening up of the European Schools : a system at the crossroads". Thesis, University College London (University of London), 2014. http://discovery.ucl.ac.uk/10018405/.
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Since 1957 European Schools have provided primary and secondary education to the children of civil servants working for the European Communities. Under an intergovernmental umbrella, these schools have implemented a specific educational framework with a highly supranational vocation. For the first time in 2009 the system adopted a reform to open up this type of schooling and the European Baccalaureate to other pupils across Europe. The process involved different institutional actors with separate motivations. This thesis is a policy analysis of the consequent opening up of the system, presented primarily as a documentbased study. It builds on previous academic research about the evolution and European essence of the system. The thesis shows that the breadth of the opening up is determined by the structure of the system, the decision-making power held by each stakeholder, the ideological vision of the member states and the European institutions, and the economic costs. The 2009 reform provides the legal opportunity to spread, expand and popularize European schooling, but the system is already facing new challenges that could jeopardize this opportunity. The system is at a crossroads. Only a much more committed attitude from the stakeholders can deliver the desired results. The originality of this study lies in providing a coherent and concise assessment of the process, the outcome and the implications of the opening up of European Schools. The principal contribution is to explain why the reform happened. The evolution of European Schools is an example of the increasing global debate on legitimizing European politics. The thesis also reflects on the relation between education and social attitudes towards the European integration project.
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Gibson, Marcia. "Opening the Web for all : inclusive and secure design of an online authentication system". Thesis, University of Bedfordshire, 2012. http://hdl.handle.net/10547/576437.
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Effective use of the World Wide Web grants users increased power over people, time and space. However, its growing ubiquity also means these powers tend to become eroded in non-users. Growth of the Web as a marketplace and as a channel to deliver e-services, results in an ever increasing volume of sensitive information being transacted and stored online. As a result, authentication systems are now being used extensively on the Web. Unfortunately the profusion of Web sites and the large numbers of associated passwords reduces their efficacy and puts severe strain on users’ limited cognitive resources. Authentication systems themselves therefore can act as an additional source of exclusion. However, this step of authentication has up until now, been largely overlooked when considering inclusive design. People may experience a variety of barriers to Internet access: Psychological, Material, Skills and Usage. Existing models of these barriers within the literature are discussed, and a unified model of exclusion is developed and used to identify a series of potential solutions to the various aspects of each barrier. These solutions are classified into 4 separate design goals: Enhanced Usability, Enhanced Accessibility, Reduced End-user Cost and Robust Security. A number of groups who are especially at risk of Web exclusion are also identified. The design goals are used to evaluate existing traditional and image-based passwords. The accessibility component is assessed in terms of twenty-two use scenarios, consisting of a particular user group’s limiting characteristic and strategies the groups are known to use when accessing the Web. The accessibility analysis shows traditional passwords to be less accessible for several groups: • Novice users who experience reduced comparative learnability, efficiency and increased errors. • Mobile phone users, head wand users, eye gaze tracker users, those with reduced manual dexterity/and or tremors accessing principally via a mouse or keyboard, those with impaired ability to select and filter relevant sensory information and low-literacy users accessing via a normal or text to speech browsers. These groups experience reduced comparative efficiency and increased errors. • Users with impaired ability to remember information or sequences and illiterate users accessing via a text-to-speech browser or normal browser. These groups have the most significant issues with passwords, experiencing reduced comparative learnability, memorability, efficiency and increased errors. Image based passwords are found to be more accessible for some of these groups, but are unusable by blind users and less usable by those with visual impairments. Just as Web users are not a uniform, homogenous group, so too is there no homogenous solution to creating usable security. Even so, there may be solutions that are usable and secure given the particular scenario within which they will be used. For this reason, it is important to supply a number of alternatives because as one modality or model of interaction is locked out, another group becomes excluded. One such alternative, a novel scheme called “Musipass”, is trialled in lab-based and large-scale online user participation experiments. Musipass is found to offer superior long-term memorability to a traditional password and users report enjoying the experience of authenticating with music. A security analysis is conducted which shows Musipass to offer comparative or enhanced security compared to a traditional password against a number of well-known attacks.
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Li, Zhehui. "Design of a Host-guest Hybrid Catalytic System Through Aperture-opening Encapsulation Using Metal-organic Framework:". Thesis, Boston College, 2019. http://hdl.handle.net/2345/bc-ir:108707.
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Thesis advisor: Jeffery A. ByersThesis advisor: Chia-Kuang Tsung
Homogeneous catalysts are advantageous in selective catalysis due to the well-defined active site at the molecular level. The poor recyclability, bimolecular aggregation, and undesired poison resistance of homogeneous catalysts hinder further industrial application despite the controlled reaction pathway due to the homogeneous environment. On the other hand, heterogeneous catalysts are preferred in industry due to their high recyclability and high activity. Yet, poor selectivity due to undefined active sites is a drawback. The construction of a host-guest system where a molecular level catalyst is incorporated into the Metal-Organic Framework (MOF) provides a promising solution to bridge those two fields. This composite maintains the advantages of homogeneous and heterogeneous catalysts and overcomes the disadvantages. However, finding an incorporation method that is versatile with minimum synthetic modification of the host and guest remains one of the challenges. In the first part of this dissertation, a new concept called “aperture-opening encapsulation’’ is introduced for incorporating large and diverse guest molecules into MOFs without changing the identity of either the guest or MOF. The approach capitalizes on the existence of linker exchange reactions, which, as our kinetic studies show, proceed via competition between associative and dissociative exchange mechanisms. The second part describes how this method is applied to incorporate a molecular catalyst into the cavity of UiO-66 for the hydrogenation of carbon dioxide to formate, which is a useful application for energy related industry. The developed hybrid composite showed the ability to be recycled, showed no evidence of bimolecular catalyst decomposition, and was less prone to catalyst poisoning. These results demonstrate for the first time how the aperture-opening process resulting from linker dissociation in MOFs can be utilized as a strategy to synthesize host-guest materials useful for chemical catalysis. After the establishment of the hybrid catalyst, the last part of the dissertation describes our efforts into the investigation of mass transport in catalysis. The understanding of the interaction between the host-guest is beneficial for the development of biological analogs in the future
Thesis (PhD) — Boston College, 2019
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Chemistry
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Nyqvist, Anette. "Opening the Orange Envelope : Reform and Responsibility in the Remaking of the Swedish National Pension System". Doctoral thesis, Stockholm : Department of Social Anthropology, Stockholm University, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-8240.
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Valdez, Michael Aaron y Michael Aaron Valdez. "Development, Characterization, and Implementation of a System for Focused Ultrasound-Mediated Blood-Brain Barrier Opening In Mice". Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/626365.
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The blood-brain barrier BBB refers to the set of specialized endothelial cells that line the vasculature in the brain and effectively control movement of molecules into and out of the brain. While necessary for proper brain function, the BBB blocks 98% of drugs from entering the brain and is the most significant barrier to developing therapies for neurodegenerative diseases. Active transport allows some specific molecules to cross the BBB, but therapeutic development using this route has had limited success. A number of techniques have been used to bypass the BBB, but are often highly invasive and ineffective. Over the last two decades, a minimally invasive technique to transiently open the BBB has been under development that utilizes transcranial focused ultrasound (FUS) in combination with intravascular microbubble contrast agents. This method is often carried out in conjunction with magnetic resonance imaging (MRI) to guide and assess BBB opening and has been referred to as MRI guided FUS (MRgFUS).
Because of the utility of mouse models of neurological disease and the exploratory nature of MRgFUS, systems that allow BBB opening in mice are a useful and necessary tool to develop and evaluate this method for clinical application. In this dissertation project, a custom built, cost-effective FUS system for opening the BBB in mice was developed, with the objective of using this device to deliver therapeutics to the brain. Being a custom device, it was necessary to evaluate the ultrasound output, verify in vivo safety, and anticipate the therapeutic effect. The scope of the work herein consists of the design, construction, and evaluation of system that fulfills these requirements. The final constructed system cost was an order of magnitude less than any commercially available MRgFUS system. At this low price point, the hardware could allow the implementation of the methodology in many more research areas than previously possible. Additionally, to anticipate the therapeutic effect, molecules of pharmacologically-relevant sizes were delivered to brain with a novel, multispectral approach. Results demonstrated that the device was able to safely open the BBB, and macromolecule delivery showed that both molecule size and FUS pressure both influence the amount and distribution of molecules in the brain. Using different ultrasound pressures, the threshold for BBB opening was found to be ≥ 180 kPa (0.13 MI). The threshold for damage was found to be ≥ 420 kPa (0.30 MI), and was minor at this pressure, but extensive for higher pressure (870 kPa, 0.62 MI), in which minor damage was caused by this pressure. Performing a novel implementation of a diffusion model on the fluorescence images of 500, 70, and 3 kDa dextran resulted in calculated diffusion coefficients of 0.032 ± 0.015, 12 ± 6.0, and 0.13 ± 0.094 square microns per second, respectively.
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Matour, Soha. "A new design for double skin facade in warm climates: Improving thermal performance and natural ventilation of the system". Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/231909/1/Soha_Matour_Thesis.pdf.
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This thesis contributes to the improvement of Double Skin facades' thermal performance in warm climates. A new design for DSF was proposed and evaluated using an experimental study on a scaled model and Computational Fluid Dynamics simulations. The proposed facade named IS-DSF (Interstitial slat-blind DSF) showed the capability to reduce overheating risk in the cavity due to two applied strategies: shading devices’ specific placement and wind-induced ventilation improvement. Finally, a framework was developed for the implementation of IS-DSF in warm climates applicable at the early stage of building design.
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Papadopoulou, Frantzeska. "Opening Pandora's Box : Exploring Flexibilities and Alternatives for Protecting Traditional Knowledge and Genetic Resources under the Intellectual Property Framework". Doctoral thesis, Stockholms universitet, Juridiska institutionen, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-100568.
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What happens when resources get valuable and scarce? How is Intellectual Property dealing with market failures related to sub-patentable innovation or purely traditional knowledge with interesting applications? The protection of traditional knowledge and genetic resources (TKGR) has been one of the major modern challenges in international IP law. The entry into force of the Convention on Biological Diversity (CBD) and its implementation in national legislation has created more questions than the ones it answered. The objective of this dissertation is to assist in the evaluation of current national and regional implementation initiatives as well in the presentation and evaluation of different forms of entitlements that could be applicable in the case of TKGR. The dissertation has employed a theoretical framework for this evaluation, by combining the Coase Theorem and Rawls' theory of justice. The choice of these two theoretical models is not a random one. In order for the entitlement covering TKGR to be successful, it has to be efficient. It has to offer a stable and efficient marketplace where access to TKGR is possible without unnecessary frictions. However, efficiency could not be the only objective. An entitlement focusing solely on efficiency would fall short of the needs and special considerations of TKGR trade. It would above all be counter to the objectives and major principles of the CBD, the “fair and equitable sharing of the benefits” and would certainly fail to address the very important North-South perspective. Fairness is thus a necessary complement to the efficiency of the proposed entitlement. This dissertation proposes a thorough investigation of the special characteristics, of right-holders, subject-matter, market place as well as of the general expectations that an entitlement is supposed to fulfill. In parallel to that, it looks into the meaning and scope of alternative entitlements in order to be able to propose the best alternative.
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Kumar, Rajesh. "High power Tesla driven miniature plasma opening switch". Thesis, Loughborough University, 2009. https://dspace.lboro.ac.uk/2134/5478.
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The plasma opening switch (POS) is used in pulsed power systems where a very fast opening and high current switch is required. Plasma is injected into the switch, which carries a large conduction current, before it opens in a process that lasts for a few nanosecond and transfers the current to a parallel-connected load at a much increased voltage and with a much shorter rise time. The conduction and opening times of the switch are dependent on plasma parameters such as the distribution, speed and species, all of which are determined by the plasma source. Most of the earlier reported work involves large dimension POSs and a correspondingly high input current (more than 100 kA) and uses carbon plasma. One main objective of the present research was to achieve a low input current (20 kA) and miniaturised POS by using hydrogen plasma rather than carbon plasma on account of its lower mass. A cable gun was selected for producing the plasma, since although this produces both hydrogen and carbon plasma these arise different times during its operation. For the present application a Tesla transformer was used in preference to a Marx generator to produce an initial high voltage pulse for the system, on the basis of its simpler design and cost effectiveness. This transformer together with an associated water PFL (pulse forming line) and pressurised switch was capable of producing a load current in excess of 20 kA with a rise time of 53 ns, which was fed through the POS to the final load. Special diagnostics arrangements were necessary to measure the fast high current and voltage pulse a in nonintrusive way. Faraday cups and a high speed camera were used to measure the plasma parameters. The overall system built (i.e. including the POS) is capable of producing a 22 kA current with a rise time of 5 ns, and of generating a power of more than 10 GW. Much of the work detailed in the thesis has already been presented in peer reviewed journals and at prestigious international conferences.
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Bell, Brian Robert. "Synthesis of novel materials using ring-opening metathesis polymerisation". Thesis, Queen's University Belfast, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295364.
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High, Chris. "Opening spaces for learning : a systems approach to sustainable development". Thesis, Open University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251404.
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Winland, Joseph L. Jr. "Opening the Window to Edward Whittemore: Systems that Govern Human Experience". Digital Archive @ GSU, 2010. http://digitalarchive.gsu.edu/english_theses/90.
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Edward Whittemore (1933-1995) is a now almost unknown American writer. This project seeks to bring Edward Whittemore to light. Though he has a simple voice and a subtle but vast knowledge of history, he writes with a fantastic imagination and dramatizes a timely but tragic message. In “Part One” of Sinai Tapestry, Whittemore explores the complex relationship between Chaos and Order through the extravagant lives of his major characters, Plantagenet Strongbow and Skanderbeg Wallenstein. Through a biography of Whittemore’s life and a close analysis of Strongbow’s and Wallenstein’s relationship, I will highlight Whittemore’s depth as an author and thinker, make evident his availability to literary analysis and critical theory, and argue the presence of Whittemore’s own ideology regarding the systems that govern human experience.
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Robertson-Ralph, Michael J. "Photochemical synthesis and electrocyclic ring opening of cyclobutene-fused bicyclic systems". Thesis, University of Bristol, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.690756.
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This thesis has two main themes both with synthetic organic photochemistry at the centre of their research aims. The first deals with the synthesis of [2.0.n] cyclobutenes via the photo [2+2] cycloaddition of propargyl alcohol with an appropriate unsaturated anhydride followed by their thermal electrocyc1ic ring opening. According to molecular orbital theory this must occur via a conrotatory operation. However, this would lead to cis,trans dienes but only cis,cis dienes have, to date, been observed.
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Sahr, Sabine. "Vergleichende computertomografische Untersuchungen zur Anatomie der tränenableitenden Wege bei brachyzephalen Hunden". Doctoral thesis, Universitätsbibliothek Leipzig, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-143903.
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This study aimed to investigate the course of the nasolacrimal drainage system in three different brachycephalic dog breeds in comparison to normocephalic dogs and to draw conclusions on potentially adverse consequences for the drainage function. A computed tomographic-dacryocystography (CT-DCG) was performed in 51 brachycephalic dogs, consisting of 23 Pugs, 18 French and 10 English bulldogs. Six normocephalic dogs of different breeds and body size served as a comparison. Two- and three dimensional images were obtained and evaluated. Several parameters (length, angulation, gradient) were used to describe the nasolacrimal drainage system and to quantify distinctions between different breeds. Furthermore several additional characteristics were analysed, including the relative position of lacrimal foramen and nasolacrimal ostium, crossing of the nasolacrimal duct below the root of the upper canine tooth, the patency of the lacrimal drainage system and the presence of an accessory opening. While the length of the nasolacrimal duct is substantially reduced in brachycephalic dogs, their lacrimal canaliculi have much larger dimensions than those of normocephalic dogs. Additionally varying parts of the nasolacrimal drainage system follow an inverse direction in short-headed dogs, giving the entire nasolacrimal apparatus a characteristic U- or V-shaped appearance. The nasolacrimal duct exhibits a much steeper alignment in brachycephalic dogs compared to normocephalic ones. This strong slope however does not interfere with drainage function because of a consistently present accessory opening, being the main or only outflow pathway in all brachycephalic dogs and hence facilitating proper tear drainage regardless of the steepness.
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Яворська, О. О. "Обґрунтування способів і засобів підвищення ефективності провітрювання марганцевих шахт". Дисертація, Видавництво НГУ, 2010. http://ir.nmu.org.ua/handle/123456789/101.
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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.26.01 - "Охорона праці" - Національний гірничий університет, Дніпропетровськ, 2010.Диссертация на соискание ученой степени кандидата технических наук по специальности 05.26.01 - “Охрана труда” - Национальный горный университет, Днепропетровск, 2010.
The dissertation on the scientific degree of the candidate of engineering sciences of speciality 05.26.01 – «Protection of labour» – National mining university, Dnepropetrovsk, 2010.
У дисертаційній роботі виконаний аналіз вентиляційних систем і стану провітрювання марганцевих шахт. Встановлено, що основним недоліком вентиляційних систем марганцевих шахт є значні непродуктивні втрати повітря в мережі підземних гірничих виробок і через надшахтні будівлі та вентиляційні споруди на поверхневому комплексі. Встановлені закономірності зміни витрат повітря за довжиною паралельних виробок з протитечією повітряного струменя. Проведено моделювання процесу зміни енерговитрат, пов'язаних з переміщенням повітря за мережі гірничих виробок, на базі яких обґрунтовані аеродинамічні параметри вентиляційних споруд та визначена область ефективного використання елементів шахтної вентиляційної мережі. Розроблена математична модель процесу взаємодії зустрічних струменів повітряних потоків в струминних аеродинамічних системах, що дозволяє визначити їх оптимальні параметри і раціональне компонування елементів для підвищення ефективності роботи в області невисоких перепадів тиску. Запропоновані та обґрунтовані критерії для оцінки ефективності роботи зустрічно-струминної аеродинамічної системи.
В диссертационной работе осуществлено решение актуальной научной задачи повышения эффективности проветривания марганцевых шахт, заключающееся в установлении закономерностей процесса утечек воздуха через вентиляционные сооружения и изменения основных вентиляционных параметров по длине параллельных выработок с противотоком вентиляционных струй, что позволило обосновать способы и разработать средства, обеспечивающие повышение эффективности проветривания марганцевых шахт. Изучены особенности формирования рудничной атмосферы в горных выработках марганцевых шахт и дана оценка существующих способов и средств с точки зрения возможности их использования в условиях марганцевых шахт. Установлено, что основной причиной, обуславливающей ухудшение состояния рудничной атмосферы на фланговых участках шахтного поля, являются утечки воздуха, возникающие вследствие большого количества вентиляционных сооружений с высокой воздухопроницаемостью по длине параллельных выработок с противотоком вентиляционных струй. Выяснено, что основным видом воздушных потоков в герметизирующих вентиляционных сооружениях, являются потоки через относительно узкие щели различных размеров и форм, образованные в результате развития горного давления. Показано, что увеличение аэродинамического сопротивления вентиляционного сооружения требует значительных дополнительных затрат. Предложено осуществлять выбор мероприятий по увеличению аэродинамического сопротивления сооружений исходя из минимума затрат на герметизацию и потерь, обусловленных утечками воздуха через герметизирующие сооружения. Разработана и теоретически обоснована экономико-математическая модель формализованного описания процесса изменения энергозатрат связанных с перемещением воздуха по сети горных выработок, отличающаяся от известных тем, что учитывает изменение длины выемочных столбов при отработке шахтного поля на границе месторождения и позволяет определять оптимальные параметры схем проветривания с учетом этих изменений. Предложена, теоретически и экспериментально обоснована математическая модель процесса взаимодействия встречных струй воздушных потоков, позволяющая определять оптимальные параметры струйных аэродинамических систем и рациональную компоновку их элементов, обеспечивающих их работоспособность при снижении утечек воздуха через надшахтные здания в условиях марганцевых шахт. Выполненные в диссертационной работе теоретические и экспериментальные исследования могут быть использованы при опытно-конструкторской разработке струйных аэродинамических установок для борьбы с внешними утечками воздуха, а также при проектировании эффективных вентиляционных систем с минимальным количеством вентиляционных сооружений.
The analysis of vent systems and state of ventilation of manganese mines is executed in the dissertation work. It is concluded, that the basic lack of vent systems of manganese mines is considerable unproductive losses of air in the network of the underground openings and through surface buildings and vent buildings on a ground complex. The conformities law of air consumption is set, depending on the length of the parallel openings with the reverse air stream. The process modeling of energy consumptions is conducted, related with moving of air outwards of the networks of the openings on the base of which the aerodynamic parameters of vent buildings are grounded and the area of the effective use of elements of a mine vent network is conducted. The mathematical model of process of co-operation of counter-flows of air streams in the stream aerodynamic systems is developed, that allows to define their optimal parameters and rational arrangement of elements to increase the efficiency of work in the field of low pressure differential. Criteria are offered and grounded for the estimation of efficiency of work of the counter-flow aerodynamic system.
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RUSI, Ilda. "Generating Innovative Perforated Patterns for Perimetric Structural Walls with Openings in Multi-Storey Buildings". Doctoral thesis, Università degli studi di Ferrara, 2021. http://hdl.handle.net/11392/2488300.
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Due to the very fast urban development and population growth to the most big cities all over the world, the multi-storey buildings have increased a lot in number. Increasingly, interest is growing in exploring structural systems that allow to build multi-storey buildings. As stated also in the literature and also by Ali. M., M, in his study in 1990, among the major issues that govern the design of a multi-storey building is fulfilling the architectural aspect such as space, function, light while ensuring also the building structural rigidity.Considering also the fact emphasized by Aminmansour & Moon, 2010; Elnimeiri & Gupta, in their study in 2008, that many times, the multi-storey buildings tend to be very inefficient in terms of organisations of the interior spaces. In this regard, based on engineering logical reasoning, in order to provide the sufficient structural rigidity, it requires in many cases, considerable cross section dimensions of structural elements. On the other hands, in engineering design practices there are several cases where to ensure the stability of the building, rigid elements are placed on the building perimeter. The problem is that often, in these cases, these structural elements may interrupt several architectural aspects of the multi-storey building such as its façade, interior space, or even the entire building architectural volume. This study present reinforced concrete Structural Wall elements which are recognized as one of three main structural systems putted on the perimeter of multi-storey buildings among rigid frames and bracing systems. This research aims in suggesting an innovative structural element be implemented in the design process by both being considered as an architectural and structural element.The Structural Wall patterns with different arrangement of openings, called Perforated Structural Wall Panels, are characterized by a pattern of openings in different sizes and forms. This panel should provide the required resistance from the lateral load acting on it while offering at the same time a visual resistance presence. From the architectural point of view, this element offer the possibility to create several configurations of geometric forms, through following a precise methodology explained in further detailed study analysis presented in this study. The methodology can help towards obtaining an optimized panel by creating also a common vocabulary for both the architect and the engineer. This designed vision based on collaboration between architects and engineers aims in fostering an alternative design method outlining an effective structural scheme of multi-storey buildings composed mainly by perforated Structural Wall elements in the building perimeter. Following this design methodology, vertical structural elements would be modified in terms of preserving the required structural members and cutting of the unnecessary ones. The research concludes by discussing on how perforated Structural Wall element can help in fostering the design process and facilitate the decisions steps within designers in concluding the proper building configuration, the architectural performance and the structural rigidity.
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Guadalupe, Báscones Julio. "Analysis of the FTA signed with the asian countries - trade facilitation and customs procedure -". IUS ET VERITAS, 2018. http://repositorio.pucp.edu.pe/index/handle/123456789/122941.
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The opening of Peru to foreign markets in the past 20 years is a consequence of the signature of several Free Trade Agreements (FTA) with our main partners in business, both on a bilateral and multilateral level. In this article, on the one hand, important changes to customs regulations concerning obligations arose from the signature of several FTA will be analyzed and, on the other hand, a comparative analysis regarding regulations about facilitation of commerce and customs procedures contained in FTA signed with our main Asian partners in business will be developed.La política de apertura comercial que el Perú ha venido impulsando desde hace más de 20 años ha originado la suscripción de sendos acuerdos comerciales con nuestros principales socios comerciales tanto a nivel bilateral como multilateral. En el presente artículo, de un lado, se desarrollan los importantes cambios generados en la normativa aduanera con ocasión de las obligaciones emanadas de la suscripción por parte del Perú de diversos TLC; y, de otro, se efectúa un análisis comparativo de las disposiciones en materia de facilitación del comercio y procedimientos aduaneros contenidas en los TLC suscritos con nuestros principales socios comerciales del Asia.
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Thorn, Zoe Elizabeth. "The development of novel polymers for use as substrates and supports in combinatorial chemistry". Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391809.
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Vera, García Jorge. "Global challenge to local production systems : the transformation of Mexican clusters after the opening to trade". Thesis, London School of Economics and Political Science (University of London), 2006. http://etheses.lse.ac.uk/2139/.
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In recent years the world has gone through significant changes in terms of trade liberalisation, globalisation of industry and economic integration between different types of countries. The global context calls for new arrangements of industry, leading to an adjustment in the regions where production actually takes place. In this context, local productions systems (LPSs) need to adapt to the change in trade regimes. The challenge appears bigger for less developed countries, which in many cases have relied on productive structures of import substitution industrialisation (ISI). This thesis studies different types of clusters in Mexico after trade liberalisation and economic integration. The main aim of this thesis is to examine the capacity of different LPSs to adapt and learn in conditions of higher competition. Using empirical evidence, three clusters specialised in clothing production that originally shared similarities during ISI but that then followed different forms of organisation and trajectories during the open economy were assessed using both the flexible industrial district and value chain approaches. Industrial organisation and linkages are traced to identify to what extent LPSs have improved or weakened in the open economy in comparison to the ISI times. The research found that LPSs that have restructured their production towards international production systems have not only survived the change in trade regime but have also benefited from the new context. They have adjusted their industrial organisation, upgraded knowledge and strengthened their LPSs, leading to greater local spillovers. Foreign partners have been crucial for product and process upgrading in the export-oriented LPSs, and notably NAFTA reduced and eliminated trade and production barriers, thereby permitting functional upgrading. In contrast, nationally-oriented LPSs have not adapted their organisation and production practices and lack internationalisation, strong linkages and innovation. This kind of cluster stays in the same traditional platform and is unable to upgrade and benefit from the new environment. Results suggest the rising of new, stronger and more competitive LPSs under a new trade regime.
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Vaidyanathan, Karthik. "Explaining unexpected electoral openings in authoritarian systems a comparative analysis of parliamentary elections /". Diss., [La Jolla] : University of California, San Diego, 2010. http://wwwlib.umi.com/cr/ucsd/fullcit?p3398834.
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Powell, Chadwick R. "Synthesis of Small Molecule and Polymeric Systems for the Controlled Release of Sulfur Signaling Molecules". Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/102217.
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Hydrogen sulfide (H2S) was recognized as a critical signaling molecule in mammals nearly two decades ago. Since this discovery biologists and chemists have worked in concert to demonstrate the physiological roles of H2S as well as the therapeutic benefit of exogenous H2S delivery. As the understanding of H2S physiology has increased, the role(s) of other sulfur-containing molecules as potential players in cellular signaling and redox homeostasis has begun to emerge. This creates new and exciting challenges for chemists to synthesize compounds that release a signaling compound in response to specific, biologically relevant stimuli. Preparation of these signaling compound donor molecules will facilitate further elucidation of the complex chemical interplay within mammalian cells.
To this end we report on two systems for the sustained release of H2S, as well as other sulfur signaling molecules. The first system discussed is based on the N-thiocarboxyanhydride (NTA) motif. NTAs were demonstrated to release carbonyl sulfide (COS), a potential sulfur signaling molecule, in response to biologically available nucleophiles. The released COS is shown to be rapidly converted to H2S in the presence of the ubiquitous enzyme carbonic anhydrase (CA). A synthetic route that affords NTAs with reactive functionalities was devised and the functional "parent" NTAs were successfully conjugated to a variety of substrates, ranging from small molecules to polymers. These functional NTAs provide a platform from which a library of NTA-based COS/H2S may be readily prepared convergently in an effort to move towards H2S-releasing drug and polymer conjugates. Additionally, preliminary in vitro cytotoxicity studies indicate that NTAs are noncytotoxic at concentrations above 100 µM.
The second system discussed in this dissertation leverages the 1,6-benzyl elimination reaction (or self-immolative reaction) to facilitate the release of a persulfide (R–SSH) from a small molecule prodrug platform as well as a separate system that releases COS/H2S from a polymer. The self-immolative persulfide prodrug was designed to be responsive to reactive oxygen species (ROS) and demonstrates efficacy as an antioxidant in vitro. Furthermore, the polymeric COS/H2S self-immolative system was designed to respond to reducing agents, including H2S itself, and shows promise as a H2S signal amplification platform.Doctor of Philosophy
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Aigouy, Louis. "Contribution a l'etude des voies du reflexe d'ouverture de la gueule et de ses fluctuations sous l'effet de stimulations peripheriques". Clermont-Ferrand 2, 1987. http://www.theses.fr/1987CLF21060.
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Pokorná, Klára. "Systém procesních auditů v oblasti zdravotnického průmyslu". Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2010. http://www.nusl.cz/ntk/nusl-222735.
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The Master’s thesis deals with the area of conducting process audits in a large multinational corporation focused on manufacturing and distribution of medical devices, which has a subsidiary in the Czech Republic. The thesis discusses the analysis of the current set up of the internal audits‘ system in the corporation and there are changes of the quality system being proposed on the basis of the analysis, whose aim is to achieve a full compliance with the requirements of the US administration FDA, the standard ISO 13485 as well as the recent requirements on performing process audits. The emphasis is also put on the setting of the system such that it provides the highest possible added value for its users, can be easily implemented in practice and is flexible as well.
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Skřivánková, Vendula. "Výzkum fázového rozhraní zrno - geopolymerní pojivo u křemenných i nekřemenných ostřiv". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231482.
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Presented thesis deals with monitoring of the properties of the interface between opening materials and geopolymer binder using three quartz and four non quartz opening materials. There is observed mainly the type of destruction of connective bridges. The theoretical part of the thesis briefly summarizes commonly used methods in foundries and monitors experience with implementation of geopolymers in different foundries. The practical part monitors shape of the grains of the chosen opening materials. There are writed down the results from the measurement of the bending strength and workability and there is observed the type of destruction of connective bridges.
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Morin, Yohann. "Aluminum organometallic chemistry related to ring opening metathesis polymerization of dicyclopentadiene : understanding, improvement and development of industrially-relevant systems". Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10033.
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Le polydicylopentadiène est un matériau aux propriétés d’usage remarquables. Il est obtenu par polymérisation par métathèse d’ouverture de cycle (ROMP) du dicyclopentadiène. Industriellement, les procédés de fabrication reposent sur le moulage à injection réactive de deux solutions de monomère: la première comprend une source de métal du groupe 6 (Mo, W), et la seconde un mélange de chloroalkyle aluminique, d’alcool et de différents additifs. Leur combinaison génère la formation in situ d’espèces actives en métathèse. Au cours de ces travaux, nous nous sommes focalisés sur la formulation à base d’aluminium. Dans un premier temps, nous avons étudié la chimie organométallique de l’aluminium en lien direct avec les formulations industrielles, ce qui nous a permis de comprendre et rationnaliser les observations faites sur ces systèmes. Puis, sur ces bases, nous avons développé de nouvelles formulations aluminiques pour l’obtention de polydicyclopentadiène en conditions industrielles, selon deux axes : modification du composant alcool, et modification du composant chloroalkyle aluminique. Certaines propriétés mécaniques des matériaux obtenus se sont avérées supérieures à celles obtenues à l’aide des procédés existants. De plus, l’apport de la chimie organométallique a été essentiel pour la compréhension de relations entre les modes de préparation et les performances des systèmes catalytiques. A l’issue de ces travaux, nous proposons une nouvelle solution industrielle pour la production de polydicyclopentadiène par moulage à injection réactivePolydicylopentadiene is a material featuring remarkable usage properties. It is obtained by ring opening metathesis polymerization (ROMP) of dicyclopentadiene. Industrial processes rely on the reactive injection molding of two monomer solutions: the first one contains a source of group 6 metal (Mo, W), and the second one, a mixture of chloroalkylaluminum, alcohol and various additives. Their combination generates in situ active species that perform metathesis. In the present work, we focused on the aluminum-based formulation. We have first studied the aluminum organometallic chemistry that is directly connected to the industrial formulations, which allowed us to understand and rationalize the observations made on these systems. Then, from this point on, we developed new aluminic formulations for polydicyclopentadiene preparation under industrially relevant conditions, working along two directions: modification avec the alcohol component, and modification of the chloroalkyl aluminum species. Some mechanical properties of the thus obtained materials proved to be better than those resulting from classical processes. Furthermore, the input from organometallic chemistry was critical to the understanding of the relationships between preparation modes and performances of the catalytic systems.From this study, we propose a new industrial solution for the production of polydicyclopentadiene by reactive injection molding
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Paratsikidou, Natalia. "Security integration in IP video surveillance systems". Thesis, KTH, Radio Systems Laboratory (RS Lab), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-143490.
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Video surveillance systems are a rapidly growing industry. As with most systems, this technology presents both opportunities and threats. The wide adoption of video surveillance systems by various businesses and individuals has raised some vital security issues. Appropriately addressing these security issues is of great importance for video surveillance systems, as these systems may capture sensitive personal data and may attract numerous attacks. As of today nearly all devices have become networked (or are on their way to being connected to networks), hence eavesdropping is a common attack which can exploit a breach of a system’s security and result in data disclosure to unauthorised parties, video stream alterations, interference, and reduction of a system’s performance. Moreover, it is important that video surveillance systems are standardized by appropriate standardization organizations in order to assure high quality of the security services that utilize these systems and to facilitate interoperability. In this master thesis project rules and regulations concerning personal data protection were studied in order to define the requirements of the proposed robust and high quality security scheme that is to be integrated into video surveillance systems. This security scheme provides United States Federal Information (FIPS)* compliant security services by securing the communication channel between the system’s devices. The authentication of the system’s devices is established by using certificates and key exchanges. The proposed security scheme has been scrutinized in order to analyze its performance (and efficiency) in terms of overhead, increased jitter, and one-way delay variations.<p> Our implementation of the proposed security scheme utilized OpenVPN to provide privacy, integrity and authentication to the video streaming captured by Veracity’s clients and stored in Veracity’s proprietary NAS device (COLDSTORE). Utilization of OpenSSL FIPS Object module develops our security scheme in a FIPS compliant solution. For testing purposes, we created different test scenarios and collected data about the total delivery time of a video file, delivered from the IPCamera/NVR/DVR devices to the COLDSTORE device, the network overhead and lastly the one-way delay between the two endpoints. Another area of interest that we focus on is how to deploy certificates to new, existing, and replacement devices; and how this deployment may affect the system’s security design. In addition, we investigate the problems arising when a secured video stream needs to be played back via another device outside of our system’s network.The results of the thesis will be used as an input for product development activities by the company that hosted this thesis project.Videoövervakningssystem är en växande industri. Precis som med de flesta systemen, har denna teknologi både möjligheter och risker. Den stora utspridningen av videoövervarkningssystemen har lett till essentiella säkerhetsrisker. Det ligger en stor vikt i att hantera säkerhetsrisker för videoövervakningssystem i och med att dessa system kan eventuellt fånga upp personlig data och därav attrahera attacker. Idag har nästan alla enheter blivit nätverksanslutna (eller är påväg att bli), vilket har lett till att avlyssning har blivit en vanlig attack. En avlyssnare kan exploatera en säkerhetsrisk och resultera i informationsläckor till obehöriga, videomanipulering, störningar, och reducerad prestanda i systemet. Det viktigt att videoövervakningssystem är standardiserade av lämpliga standardiseringsorganisationer för att säkra en hög kvalité i säkerhetstjänsterna som använder sig av dessa system och för att försäkra sig om kompatibilitet.<p> I den här examensarbetet studerade man regler och förordningar som har att göra med säkrandet av personlig data, för att kunna definiera kraven för det föreslagna robusta och högkvalitativa säkerhetsarkitekturen som skall integreras med videoövervakningssystemen. Säkerhetsarkitekturen erbjuder United States Federal Information (FIPS)* kompatibla säkerhetstjänster genom att säkra kommunikationskanalen mellan systemets enheter. Autentiseringen av systemets enheter sker genom att använda certifikat och nyckelutbyten. Det föreslagna säkerhetsarkitekturen har granskats för att analysera dess prestanda vad gäller ineffektiviteter, ökade störningar och fördröjningar i envägs variationer. Vår genomförandet av den föreslagna systemet utnyttjas OpenVPN att tillhandahålla sekretess, integritet och autentisering till strömmande video fångades av Veracity kunder och lagras i Veracity egenutvecklade NAS-enhet (COLDSTORE). Utnyttjande av OpenSSL FIPS Objekt modulen utvecklar vår trygghet i ett FIPS-kompatibel lösning. För teständamål, skapade vi olika testscenarier och insamlade data om den totala leveranstiden för en videofil, som levereras från IPCamera / NVR / DVR-enheter till fryshus enhet, nätverket overhead och slutligen den enkelriktad fördröjning mellan de två ändpunkterna. Ett annat område av intresse som vi fokuserar på är certifikat för nya, existerande och ersättningsenheter; och hur det kan påverka systemets säkerhetsarkitektur. Utöver detta undersöker vi problemen som uppstår när en säkrad videoström behöver spelas upp i en enhet utanför systemets nätverk. Insatsen gjord i det här examensarbetet kommer användas som grund för produktutvecklingen av företaget där examensarbetet gjordes.
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Peckham, Timothy J. "Ring-opening polymerization of [1]metallocenophanes, a route to organometallic polymeric micelles, ionomeric poly(ferrocenes) and other systems of interest". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0015/NQ53893.pdf.
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Frost, Pamela Ann. "Evaluating the potential for preservation of the Oak Openings in northwestern Ohio using geographic information systems". Connect to resource, 1994. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=osu1250533569.
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Diep, Nhut Kiet. "Studies of nucleophile ring opening of oxabicyclic systems in highly polar media application to a total synthesis of antitumor agent, (-)-epothilone B /". Diss., Montana State University, 2006. http://etd.lib.montana.edu/etd/2006/diep/DiepN0806.pdf.
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Polyketides constitute an important family of natural products, having a broad spectrum of biological activity such as antitumor, antibiotic, antifungal, or immunomodulatory action.¹ Many of these compounds possess polypropionates (units with alternating hydroxyl and methyl groups), reflecting their common biosynthesis that is found within nature. Their structural complexity and importance of these compounds as therapeutical agents have made them attractive targets for synthetic organic chemists.¹ Excellent chiral propionate reagents have been developed over the years, including many chiral auxiliaries to direct and promote stereoselectivity, but most recent, investigations have focused upon developing metal-catalyzed asymmetric ring opening. To achieve these results, transition metals (Ni, Pd, Pt) have been employed leading to synthetically useful transformations. This dissertation describes an alternative methodology to the use of transition metal. Ring opening reaction via polar media methodology developed in the Grieco group was extended to the synthesis of polypropionates and the completion of the naturally occurring epothilones. The use of 5.0 M lithium perchlorate in ether as a reaction solvent was required to obtain direct bridgehead opening of oxabicyclic[3.2.1] compound. Many nucleophiles (silyl enol ether and silyl ketene acetal) were tested for ring opening, but minimal diastereoselectivity was achieved. The reaction was improved by changing the O-silyl group of the oxabicyclic[3.2.1]-silyl enol ether (from O-TBS to O-TBDPS). Addition of trimethylsilyl chloride (TMSCl) enhanced reaction when hindered nucleophile was employed. Chiral nucleophiles (silyl enol ether and silyl ketene acetal) were also attempted, but ring opening did not transpire. This thesis explains the conceptual development of direct ring-opening of [3.2.1]-oxabicyclic octene, explorating the scope, and proving the principle by the completion of the epothilones synthesis.
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Rasiwasia, Akshay. "A Framework To Implement OpenID Connect Protocol For Federated Identity Management In Enterprises". Thesis, Luleå tekniska universitet, Datavetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-64848.
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Federated Identity Management (FIM) and Single-Sign-On (SSO) concepts improve both productivity andsecurity for organizations by assigning the responsibility of user data management and authentication toone single central entity called identity provider, and consequently, the users have to maintain only oneset of credential to access resources at multiple service provider. The implementation of any FIM and SSOprotocol is complex due to the involvement of multiple organizations, sensitive user data, and myriadsecurity issues. There are many instances of faulty implementations that compromised on security forease of implementation due to lack of proper guidance. OpenID Connect (OIDC) is the latest protocolwhich is an open standard, lightweight and platform independent to implement Federated IdentityManagement; it offers several advantages over the legacy protocols and is expected to have widespreaduse. An implementation framework that addresses all the important aspects of the FIM lifecycle isrequired to ensure the proper application of the OIDC protocol at the enterprise level. In this researchwork, an implementation framework was designed for OIDC protocol by incorporating all the importantrequirements from a managerial, technical and security perspective of an enterprise level federatedidentity management. The research work closely follows the design science research process, and theframework was evaluated for its completeness, efficiency, and usability.
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Cutler, Bryant Gordon. "Simple, Secure, Selective Delegation in Online Identify Systems". Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2515.pdf.
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Nyame, Mendendy Boussambe Gildas. "Elaboration de composés oléophiles super amphiphiles biosourcés polymorphes rétenteurs et vecteurs d'eau dans les procédés de cure et bitumes". Phd thesis, Toulouse, INPT, 2015. http://oatao.univ-toulouse.fr/16496/1/NYAME_MENDENDY_BOUSSAMBE.pdf.
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Les milieux réactionnels issus de l’étude de la réactivité de deux types de polyols, le glycérol et le diglycérol par réaction d’estérification directe avec l’acide undécylénique, catalysée par l’acide dodécylbenzène sulfonique (ADBS). Les résultats montrent que les ystèmes polyol/acide undécylénique donnent une émulsion eau dans huile (E/H). L’ajout de l’ADBS et de l’eau formée in-situ aux systèmes polyol/acide undécylénique ont permis de réduire la taille des gouttelettes de 50 μm à moins de 1 μm et d’obtenir un système organisé (micro-réacteur). L’augmentation de la température contribue à favoriser le transfert de matière dans les systèmes émulsionnés et / ou gélifiés et d’obtenir un système monophasique, homogène et structurés. L’étude de la réaction de ces systèmes avec une approche site à site (site OH / site COOH) a montré que lorsque le nombre de sites acides carboxyliques est inférieur à celui des sites hydroxyles, la synthèse est totalement sélective en esters partiels des deux polyols (glycérol et diglycérol). Les rendements sont supérieurs respectivement à 60% en esters partiels de glycérol et à 70% en esters partiels de diglycérol. La modélisation de la cinétique de synthèses et la régression des données cinétiques ont montré que la réaction est réversible d’ordre 2 et athermique. Les énergies d’activation calculées sont de 17 kcal/mol et 16 kcal/mol respectivement pour le monoundécénoate de glycérol (MUG) et le diundécénoate de glycérol (DUG). De plus, la méthodologie de recherche expérimentale a montrée que les variables (concentration en catalyseur ADBS et température) permettent d’obtenir le MUG avec un rendement de plus de 60% et une sélectivité en MUG de 80%. Ensuite, l’étude de la réactivité de la double liaison terminale du MUG en présence de deux agents oxydants pour engendrer des molécules bolaamphiphiles simples a été réalisée par H2O2 / acide formique et acide métachloroperbenzoïque (m-CPBA). Les résultats ont montré le 10,11-dihydroxy-monoundécénoate de glycérol (MUGDiol) est obtenu par oxydation au H2O2 / acide formique et le 10,11-époxy-monoundécénoate de glycérol (MUGE) par réaction d’époxydation avec la m-CPBA. L’ouverture de la fonction époxyde par des molécules aminées permet l’observation de nouvelles molécules bolaamphiphiles : le 10-hydroxy-N-11-((2-hydroxyéthyl)amino)monoundécénoate de glycérol(bola éthanolamineglycérol) et le N,N-11-(diaminobutan)-10-hydroxymonoundecanoate de glycérol (bola diaminobutaneglycérol). L’étude des propriétés physico-chimiques de ces molécules amphiphiles et bolaamphiphiles a permis de monter que toutes ces molécules sont de solvo-surfactants actifs aux interfaces et elles réduisent la tension interfaciale de l’eau jusqu’à la limite de la solubilité dans l’eau. L’adsorption des molécules ne vérifie pas le modèle de Gibbs. Le MUG et le MUDG s’auto-assemblent dans l’eau et donnent des nano-objets (vésicules et agrégats plats) et s’adsorbent sur des surfaces polaires et solides (silice et ciment). Ces deux molécules retiennent 30% et 56% molécules d’eau et le nombre de molécules d’eau fortement liée aux têtes polaires est de 21 et 49 respectivement pour le MUG et le MUDG. Pour es molécules bolaamphiphiles pures (MUGE et bola éthanolamineglycérol), elles retiennent plus de 56% de molécules d’eau et se lient à plus 53 molécules d’eau. L’ensemble de ces propriétés physico-chimiques a permis de répondre aux problématiques industrielles et de formuler un produit de cure, un agent de démoulage et un produit anti-adhérent.
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Cunha, Hugo Assis. "An architecture to resilient and highly available identity providers based on OpenID standard". Universidade Federal do Amazonas, 2014. http://tede.ufam.edu.br/handle/handle/4431.
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Quando se trata de sistemas e serviços de autenticação seguros, há duas abordagens principais: a primeira procura estabelecer defesas para todo e qualquer tipo de ataque. Na verdade, a maioria dos serviços atuais utilizam esta abordagem, a qualsabe-sequeéinfactívelefalha. Nossapropostautilizaasegundaabordagem, a qual procura se defender de alguns ataques, porém assume que eventualmente o sistema pode sofrer uma intrusão ou falha e ao invés de tentar evitar, o sistema simplesmente as tolera através de mecanismos inteligentes que permitem manter o sistema atuando de maneira confiável e correta. Este trabalho apresenta uma arquiteturaresilienteparaserviçosdeautenticaçãobaseadosemOpenIDcomuso deprotocolosdetolerânciaafaltaseintrusões, bemcomoumprotótipofuncional da arquitetura. Por meio dos diversos testes realizados foi possível verificar que o sistema apresenta um desempenho melhor que um serviço de autenticação do OpenID padrão, ainda com muito mais resiliência, alta disponibilidade, proteção a dados sensíveis e tolerância a faltas e intrusões. Tudo isso sem perder a compatibilidade com os clientes OpenID atuais.
Secure authentication services and systems typically are based on two main approaches: the first one seeks to defend itself of all kind of attack. Actually, the major current services use this approach, which is known for present failures as well as being completely infeasible. Our proposal uses the second approach, which seeks to defend itself of some specific attacks, and assumes that eventually the system may suffer an intrusion or fault. Hence, the system does not try avoiding the problems, but tolerate them by using intelligent mechanisms which allow the system keep executing in a trustworthy and safe state. This research presents a resilient architecture to authentication services based on OpenID by the use of fault and intrusion tolerance protocols, as well as a functional prototype. Through the several performed tests, it was possible to note that our system presents a better performance than a standard OpenID service, but with additional resilience, high availability, protection of the sensitive data, beyond fault and intrusion tolerance, always keeping the compatibility with the current OpenID clients.
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SAVARESE, FRANCESCO. "Data Fusion Methods and Algorithms in the Context of Autonomous Systems - A path planning algorithms analysis and optimization exploiting fused data". Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2752655.
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Toufanpanah, Monir. "Decision Support framework: Reliable Federated Single Sign-on". Thesis, Luleå tekniska universitet, Datavetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-62594.
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Identity management is a critical concept for enterprises, and it has turned to more challenging issue since businesses are significantly moving towards service oriented architecture (SOA) with the aim to provide seamless service delivery to their customers, partners and employees. The organizational domains are expanded to blur the virtual borders, simplify the business collaboration and maximize opportunities in the competitive market place, which explicitly shows the essentiality for federating the identities. Real-world identity comprises of different dimensions such as Law, Business, Policy, Technology and Society, therefore reliable digital identity management and successful federation are required to take these dimensions and complexity into consideration. Considering variety of academic and industrial researches that report on remarkable demands for identity federation adoption by enterprises, this study has approached federated Identity Management from technological point of view. Technologies provide tools and mechanisms to satisfy the business requirements and enable single sign-on capability in reliable federated platform. Different authentication technologies and standards have emerged to enable federated single sign-on (FSSO) implementation as a core service of the FIdM, each with different features and capabilities. This brings more complexity and confusion for experts and decision makers for FIdM adoption and development. To overcome this obstacle and accelerate the data collection and analysis process for decision makers, this research contributes to the filed by providing a conceptual framework to simplify the analysis of underlying technology for decision making process. In this framework 1) a list of state-of-the-art requirements and mechanisms for successful identity federation and reliable SSO is elaborated, 2) Six most prevalent standard authentication technologies along with latest specifications are analysed, explained and assessed against the defined criteria, and 3) several security and privacy consideration are gathered. The usage of framework is monitored and the efficiency of it is evaluated in 2 real business case scenarios by five IT experts and the result is reported.
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Josefsson, Ågren Fredrik y Oscar Järpehult. "Characterizing the Third-Party Authentication Landscape : A Longitudinal Study of how Identity Providers are Used in Modern Websites". Thesis, Linköpings universitet, Institutionen för datavetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-178035.
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Third-party authentication services are becoming more common since it eases the login procedure by not forcing users to create a new login for every website thatuses authentication. Even though it simplifies the login procedure the users still have to be conscious about what data is being shared between the identity provider (IDP) and the relying party (RP). This thesis presents a tool for collecting data about third-party authentication that outperforms previously made tools with regards to accuracy, precision and recall. The developed tool was used to collect information about third-party authentication on a set of websites. The collected data revealed that third-party login services offered by Facebook and Google are most common and that Twitters login service is significantly less common. Twitter's login service shares the most data about the users to the RPs and often gives the RPs permissions to perform write actions on the users Twitter account. In addition to our large-scale automatic data collection, three manual data collections were performed and compared to previously made manual data collections from a nine-year period. The longitudinal comparison showed that over the nine-year period the login services offered by Facebook and Google have been dominant.It is clear that less information about the users are being shared today compared to earlier years for Apple, Facebook and Google. The Twitter login service is the only IDP that have not changed their permission policies. This could be the reason why the usage of the Twitter login service on websites have decreased. The results presented in this thesis helps provide a better understanding of what personal information is exchanged by IDPs which can guide users to make well educated decisions on the web.
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Macknojia, Rizwan. "Design and Calibration of a Network of RGB-D Sensors for Robotic Applications over Large Workspaces". Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/23976.
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This thesis presents an approach for configuring and calibrating a network of RGB-D sensors used to guide a robotic arm to interact with objects that get rapidly modeled in 3D. The system is based on Microsoft Kinect sensors for 3D data acquisition. The work presented here also details an analysis and experimental study of the Kinect’s depth sensor capabilities and performance. The study comprises examination of the resolution, quantization error, and random distribution of depth data. In addition, the effects of color and reflectance characteristics of an object are also analyzed. The study examines two versions of Kinect sensors, one dedicated to operate with the Xbox 360 video game console and the more recent Microsoft Kinect for Windows version.
The study of the Kinect sensor is extended to the design of a rapid acquisition system dedicated to large workspaces by the linkage of multiple Kinect units to collect 3D data over a large object, such as an automotive vehicle. A customized calibration method for this large workspace is proposed which takes advantage of the rapid 3D measurement technology embedded in the Kinect sensor and provides registration accuracy between local sections of point clouds that is within the range of the depth measurements accuracy permitted by the Kinect technology. The method is developed to calibrate all Kinect units with respect to a reference Kinect. The internal calibration of the sensor in between the color and depth measurements is also performed to optimize the alignment between the modalities. The calibration of the 3D vision system is also extended to formally estimate its configuration with respect to the base of a manipulator robot, therefore allowing for seamless integration between the proposed vision platform and the kinematic control of the robot. The resulting vision-robotic system defines the comprehensive calibration of reference Kinect with the robot. The latter can then be used to interact under visual guidance with large objects, such as vehicles, that are positioned within a significantly enlarged field of view created by the network of RGB-D sensors.
The proposed design and calibration method is validated in a real world scenario where five Kinect sensors operate collaboratively to rapidly and accurately reconstruct a 180 degrees coverage of the surface shape of various types of vehicles from a set of individual acquisitions performed in a semi-controlled environment, that is an underground parking garage. The vehicle geometrical properties generated from the acquired 3D data are compared with the original dimensions of the vehicle.
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Roels, Jochen. "Beiträge zur Synthese von Modellsystemen des heterobicyclischen Grundgerüstes der Saragossasäuren/Squalestatine sowie methodische Untersuchungen zur chemoselektiven mono-Debenzylierung von N,N-Dibenzylaminen und katalytischen enantioselektiven Ringöffnung von meso-Epoxiden". Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2000. http://nbn-resolving.de/urn:nbn:de:swb:14-994697037140-73077.
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Es wurden Untersuchungen zur Synthese von Modellsystemen des heterobicyclischen Grundgerüsts der Saragossasäuren/Squalestatine durch Acetalisierung unterschiedlich konfigurierter acyclischer Diketohexaole durchgeführt. In diesem Zusammenhang gelang die biderektionale Darstellung eines Modellsystems in sieben Stufen mit einer Gesamtausbeute von 34 %. Als Methode zur Etablierung der korrekten Konfiguration der Hydroxygruppen diente die asymmetrische Dihydroxylierung nach Sharples. In einem weiteren Teil der Arbeit wurde die selektive mono-Debenzylierung verschiedener N,N-Dibenzylamine mit Cer(IV)ammoniumnitrat (CAN) und DDQ untersucht. In diesem Kontext konnte eine neue, sehr schonende, Methodik zur chemoselektiven mono-Debenzylierung tertiärer N,N-Dibenzylamine erarbeitet werden. Im letzten Teil der Arbeit wurden zwei neue, verbrückte Heterobimetall-Katalysatoren auf Basis von BINOL-Liganden entwickelt. Diese Katalysatoren wurden für die asymmetrische Ringöffnung verschiedener meso-Epoxide mit 4-Methoxyphenol genutzt und lieferten die Öffnungsprodukte in guten Ausbeuten und Enantiomerenüberschüssen (ee: 80 - 90 %)The intramolecular acetalisation of several diketohexaols tko the bicyclic skelleton of saragozic acids/squalestatines were investigated. It was possible, by using a bidirectional synthesis sequence, to obtain a model for the core structure of saragozic acids in seven steps with a total yield of 34 %. To establish the correct configuration of up to six hydroxygroups the Sharpless asymmetric dihydroxylation protocoll was used. In the second part of the dissertation a new and mild method for debenzylation of N,N- Dibenzylamines was elaborated. Tertiary amines incorporating two N-benzyl substituents are readily mono-debenzylated with CAN or DDQ. In the last part of the dissertation the synthesis of two bridged heterobimetallic catalysts for the catalytic enantioselective ring opening of meso-epoxides is described. The ring opening reaction was performed using 4-methoxyphenol as a nucleophile an different meso-epoxides to give the ring opened products in good yields and enaniomeric excesses (ee: 80 - 90 %)
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Růžička, Jiří. "Polyfunkční koncový dům v Karlových Varech". Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265694.
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The project solves a multifunctional Duma building in a vacant lot, contemplated the construction site is located in Carlsbad, in the street Vyhlíce. This is a protected site spa. Part of the project's layout and structural design of the house. It is a six-storey house with an attic and a basement floor. It is designed as a free-standing in the gap as the final house. The layout is divided into two complete units with their own input. There are spaces for business and residential units for permanent housing. Part of the living area are also room house equipment. Inputs to both parts are wheelchair accessible. The house is not wheelchair The house is designed as a brick building of brick masonry Porotherm the module dimensions of 250 (125) mm with reinforced concrete ceilings. Roofed by a hipped roof. The house is located on a private plot of 519 m2 built-up area of 221 m2. The land is gently sloping. The main orientation of the building to the cardinal's east and west. The south wall is adjacent to the neighboring house.
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Min-Lung, Yang y 楊閔隆. "A Central Opening Strut System for Foundation Excavation". Thesis, 2000. http://ndltd.ncl.edu.tw/handle/96076179488251523120.
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碩士國立臺灣科技大學
營建工程系
88
A central opening strut system is studied and developed. This system is adopted to support slurry-walls in foundation excavation. The system consists of at least two regular polygon modules and a number of strut members. These strut members connect the slurry-walls and the regular polygon module together, so that the earth pressure acting on the slurry-walls in one direction can be transmitted to the slurry-walls in the other directions by the arch action of the regular polygon modules. The objective of this research is to investigate the mechanical behavior of the central opening strut system. In addition, the optimal preload applied to a strut system is also studied.
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Mei-Huang, Lo y 羅美煌. "A Study Of Chain-Store Opening System Collaboration Key Factors". Thesis, 2003. http://ndltd.ncl.edu.tw/handle/87546327798708462906.
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碩士國立臺北科技大學
商業自動化與管理研究所
91
The chain store developing decision is one of the most important functional strategies in a retail chain service industry. A retail chain determines its progressional store developing goal based on the entire business operation strategy in order to make specific store developing decision. Presently, information related to chain store developing in most books and articles published is limited to topics like store opening prerequisites, theoretic commercial circle definition, or ideal store developing goal studies, etc. The information on chain store developing system is relatively insufficient. This explorative research is conducted with in-depth interviews in two stages. Domestic consultants and professionals with solid chain store operation expertise are invited in the first stage, to help structuring the concept of case analyses. In the second stage, managers of well-known chain store businesses are invited to review their implementation of chain store developing system collaboration operation, to share their valuable comments and to support the finding that there’s a common demand in chain store developing system in the retail chain service industry. Key affecting factors and conclusions are defined after the interviews: 1) the chain store developing system is a critical factor to the long lasting retail chain service business, 2) detailed functional planning and specific job definition should be achieved in collaboration operation, 3) the performance of collaboration operation is determined by the management model, and 4) a well communicated team is the store developing goal achieving key element.
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Hsu, Chun-Tien y 許春田. "Design and Implementation of a Network-Based Bid-Opening System". Thesis, 1999. http://ndltd.ncl.edu.tw/handle/20220850101563475275.
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碩士國立交通大學
工業工程與管理系
87
A bid-opening system for trading eggs on Internet is designed and implemented under the polynomial secret-sharing algorithm. Essentially the bid-opening process is to retrieve the data from different secrete-sharing site servers and find the bid winners. At the design phase, the bid-opening process is specified by IDEF0 technique. Then the corresponding database for storing the secrete-sharing data is designed using minimal cover theorem and IDEF1X technique. At the implementation phase, many software modules have to be implemented to execute the four major tasks in finding the bid winners. Task one recovers the true transaction data by refining the mixed secret-sharing data. Task two forms a look-up table for the supply and demand curves generated from the transaction data. Task three is to decide the parameters for finding the equilibrium of demand and supply curves. Task four is to generate their graphic and tabular outputs for winners. The experimental bid-opening system for trading eggs has been well tested at various environments. The performance shows the feasibility of the underlying system.
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Tsai, Shu-Chen y 蔡數真. "Design and Implementation of Opening-Book System of Computer Connect6". Thesis, 2011. http://ndltd.ncl.edu.tw/handle/49970339321521822643.
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碩士中原大學
應用數學研究所
99
With the human need in life, the civilizations were changed, and the development of technology and science. The invention of the computer was of great benefit to humanity. The computer appears to solved many kind of problems on computing. The “ Chess Game ” was evolved by computer science, and had their own system. The computer chess game usually have three phases, including opening database, endgame database, and midgame search. In this paper, we focus on the opening book system for computer Connect6. At the beginning of the system built that should be collection chess manual and do knowledge as possible, and then construct a useful opening book system. Therefore, on the base of the opening book system, the midgame can have more information to do search and do well on moves choose.
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Min-Long, Yang y 楊閔隆. "Study on an Innovative Central Opening Strut System for Foundation Excavation". Thesis, 2004. http://ndltd.ncl.edu.tw/handle/39267216564091358401.
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博士國立臺灣科技大學
營建工程系
92
This research presents a new strut system for foundation excavation. The major difference between the new strut system and the conventional one is that the new system is arranged to form a large opening space in its central part, which will improve the efficiency of excavation work. This new system is named as the Central Opening Strut System (COSS). The COSS consists of one or more regular polygon module frames and its peripheral strut members. The arching effect of the system is able to transmit lateral pressure on a diaphragm wall in one direction to that of the other directions. Meanwhile, the higher indeterminate frame largely increases the stability of COSS. In this research, the design method and characteristics of COSS are studied, and the advantage and disadvantage between COSS and conventional grid system are compared. The strength of COSS is analyzed by finite element method. Finite element program ANSYS was employed to perform the stability analysis of the system and to study of the behavior of the interior joints of COSS. The results are used to study the design parameters and stress distribution of the joints. In additional to the numerical analyses, a full-scale structural testing of the joint subassemblage is performed to investigate the structural behaviors of the joint. The result showed that the welds on the joint performed successfully when loaded into plastic stages. A construction site of 40m X 40m is chosen as a case study to examine the behavior of soil-structure interaction. ABAQUS finite element program is employed to study the difference of 3-D excavated behaviors between COSS and conventional strut system. The 3-D analytic solutions showed that the behavior of COSS and conventional system performed similarly. The maximum displacements of diaphragm wall of the two systems were almost the same during the whole construction stages. However, the new system can provide a large opening space, and hence can largely increase the efficiency of the constructions work and significantly shorten the construction time. Design aids and construction procedures for the COSS are also provided for engineering applications.
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Liao, Shu-Mao y 廖述茂. "Design of the Opening/Closing Door Mechanism System in the Elevator". Thesis, 2003. http://ndltd.ncl.edu.tw/handle/40903389490690046696.
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碩士國立中山大學
機械與機電工程學系研究所
91
The elevator is a common vertical transportation in our life. The elevator door system includes a door driven system, a door coupling, a door safety, and two door locks. The purpose of this work is to develop a systematic methodology for the design of the elevator door system. First, basic characteristics of the elevator door system are deduced, and all possible variants of function structures are synthesized by functional analysis method. Next, a system of kinematic notation is used to generate the principle solutions of each function in the function structure. Finally, all design concept variant can be created by using morphological chart method. Several design concept can be created for new elevator door system.
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Shen, Bo-fong y 沈柏夆. "Fabrication of Car Door Opening Safety Protection System with Serial Communication". Thesis, 2016. http://ndltd.ncl.edu.tw/handle/43758808658762753306.
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碩士桃園創新技術學院
機械工程系機械與機電工程碩士班
104
This research is to develop a car door opening safety protection system with serial communication that can be conveniently applied on common vehicles. The system is consist of a wheel speed sensor, a gear switch, a door opening sensor, a seat belt sensor, an audio and speaker unit, a rearview mirror camera and a video displayer, a LED moving warning lamp, RS-232 serial communication and 8051 single-chip, and can be refitted or optionally installed on common vehicles. While the system operating will lock the door for 3 to 5 seconds and play a warning sound to remind the passenger who is going to get off the car, On the other hand, the serial communication to the LED moving warning lamp on the rear windshield, reminds the vehicle driver from behind by the LED warns the action of door opening, both methods are adopted to avoid the endless door opening traffic accidents. The system uses an original self-creation sound module, rearview mirror camera and video displayer, LED moving warning lamp and RS-232 serial communication skill, and let the rear LED moving warning lamp can showing the forward/back, stop, turn right and left and door opening etc. ,of the car operation information by two signal line. This is not only achieving the goal of research, but also greatly reducing the amount and cost of the wire. The system has very good effect on warning or avoiding car accidents whether the car passenger or the car from behind. Therefore it has great commercial value and it has applied for a national patent.
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LIU, CHUN-HUNG y 劉峻宏. "Real-time Cardoor-Opening Detection System for Motorcycles by Deep Learning". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/qb726n.
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碩士國立臺北科技大學
車輛工程系
107
Nowadays, Advanced Driver Assistance Systems (ADAS) is one of the important research topics in automotive research field, which applies many state-of-art machine learning technologies. However, there is no satisfied safety solution for motorcycles in urban area with complex traffic flow. A cyclist is at the risk of fetal accidents every time on the road. Every year many motorcycle cyclists meet fetal collision by suddenly opened car door of cars parked in roadside. Thus there is an urgent need for motorcycle anti-collision system. This paper developed an intelligent safety system for motorcycles for anti-collision prediction by using machine learning and deep learning technologies. The proposed system creates a novel vision-based intelligent framework which can extract image features based on multiple methods such as deep learning networks with Faster Region Convolutional Neural N etworks (Faster R-CNN) model under Tensorflow environment. This intelligent vision-based detection system then can capture sampling frames from real-time video stream which is recorded by a camera. The detection segment of this system can identify target object and extract its image features. Then a multi-layer segment based on Faster R-CNN deep leaning model provides classification functions for real-time decision making. This decision then becomes an important factor to trigger emergency alarm and protection control. By this way, this system can then provide real-time detection of suddenly car-door opening and launch warning alarm and protection control. To develop this system, thousands of frames of car-door opening or closed car door were taken. And these frames are for training and testing in the machine learning. From the results, up to 99% of the events of suddenly car-door opening can be successfully detected by our system. It concludes that our system can provide good real-time anti-collision function for motorcycles, and significantly reduce cyclists’ risk of fetal collision by sudden car-door opening.